An ad campaign by Grey Group Spain for the Aid to Children and Adolescents At Risk Foundation (ANAR Foundation) that uses lenticular printing to display a hidden message to abused children, even if accompanied by a potential aggressor.

Viewers below a certain height (the average height of a child 10 or younger) will see the phrase “if somebody hurts you, phone us and we’ll help you” and a photo of an abused boy.. Someone viewing the poster from the average height of an adult, however, will see a normal photo of the same boy with the text “sometimes child abuse is only visible to the child suffering it.”